Possession:

Two teams in any given game are essentially limited to the same number of possessions. It means winning team will have more points per
possession than loosing team. A possession ends (by nbastuffer.com):
- by making a field goal attempt;
- by missing a shot and not getting the offensive rebound;
- by turning the ball over;
- by going to the line for two or three shots and either making the last shot or not getting the rebound of a missed last shot.